Comparison

Ember Fasting vs SOL

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ember Fasting

This app provides a simple and beautiful intermittent fasting timer with a widget-first design. It offers precise tracking of fasting progress, various popular protocols, and metabolic insights for Pro users. The app focuses on a clean user experience without ads or dark patterns.

Highlights
  • Widget-first design for home and lock screens
  • Fast launch time and smooth animations
  • Live metabolic process tracking (Pro)
  • Support for 5 popular fasting protocols
  • Streak tracking and milestone celebrations
  • Smart notifications for fast completion
Features
Read full description

The fasting timer that respects your time and your wallet. Ember is a beautifully crafted intermittent fasting timer that just works. No account required. No ads. No dark patterns. Just a precise, reliable timer with stunning widgets and honest pricing. WIDGET-FIRST DESIGN Check your fasting progress without opening the app. Ember offers 7 widget styles: small interactive, medium, large, Lock Screen, and StandBy. Your progress is always a glance away. Start and stop fasts right from your home screen. BEAUTIFUL & FAST Launches in under a second. Your body runs multiple metabolic processes during a fast: fat burning, ketosis, autophagy. They overlap and build on each other gradually. Ember tracks your progress with smooth animations and warm, purposeful design. Choose from 10 curated color themes or set your own custom accent color. Pick from 8 app icon styles to match your aesthetic. METABOLIC INSIGHT (PRO) Fasting isn't a series of stages you enter and leave, it's overlapping biological processes that build on each other. Pro unlocks live metabolic process tracking: see fat burning, ketosis, and autophagy ramping simultaneously with intensity indicators. Tap the info icon during any fast to see exactly what's happening in your body. EVERYTHING YOU NEED, NOTHING YOU DON'T - All 5 popular protocols: 16:8, 18:6, 20:4, OMAD, or create your own - Streak tracking with milestone celebrations - History with weekly calendar view - Basic stats to track your progress - Smart notifications for fast completion, zone transitions, and daily reminders HONEST PRICING The full fasting timer is free. No trial traps. No surprise charges. Pro unlocks metabolic insight, extra widget styles, themes, icons, and advanced notifications for $1.99/month, $14.99/year, or $29.99 lifetime. That's it. PRIVACY BY DESIGN Your data never leaves your device. No account. No analytics. No tracking. Our App Store privacy label is "Data Not Collected"...and we mean it. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

SOL

Read full description

SOL (솔) is Korean for pine tree. Like the pine that endures through every season, SOL stands with you through every fast. WHAT MAKES SOL DIFFERENT Most fasting apps just show a timer. SOL shows you what is happening inside your body as the hours pass, with the research behind it. As you fast, SOL guides you through eight phases: Fed State, Insulin Dropping, Fat Burning, Ketosis, Autophagy, Deep Autophagy, Growth Hormone Surge and Immune Reset. FEATURES • A calm timer with a progress ring and phase markers • Your fast on the lock screen and in the Dynamic Island • All 8 phases explained, with links to the published studies • A goal dial from 12 to 72 hours, or an open fast with no limit • Started earlier? Set the time you last ate, and correct it later • Switch the timer between time elapsed and time to go • A daily reminder to start your fast • Your Journey: stats, streaks, a 7 day view and your history • Edit, add or delete past fasts • Guidance on breaking your fast gently • Home screen widget • "Start my fast" with Siri • Share your results with a beautiful card • Light and dark mode with handcrafted watercolor textures FASTING TOGETHER If you like, join the live count of people fasting right now. It is optional, anonymous and off until you turn it on. YOUR DATA No account, no ads, no tracking. Your fasting data stays on your device unless you choose to join the community count or turn on iCloud backup. DESIGNED WITH INTENTION SOL is inspired by the simplicity of nature. No clutter and no paywall. Just you, your fast, and a clearer picture of what your body is doing. SOL is free. If you enjoy it, you can leave a tip. ABOUT THE SCIENCE Phase information is based on peer-reviewed research, with direct links to the sources. Some findings come from animal studies, and every body responds differently. SOL offers general wellness information and is not medical advice. Please talk to a doctor before fasting, especially for longer fasts. Begin your fast. Know your body. Grow like the pine.

Screenshots

Ember Fasting4 screens
SOL4 screens

Verdict

The call

Ember Fasting and SOL are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ember Fasting sells 3 in-app purchases, starting at $1.99 per month and SOL sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Ember Fasting ships an update every 2 weeks, SOL fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

ScorecardNo meaningful differences
Ember Fasting versus SOL: the parameters behind the verdict, then further details
ParameterEmber FastingSOL
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 weeks — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.016 — better
Further details — not scored
Size3 MB7 MB
Age rating4+4+
DeveloperChris SchradeDanny Linsner

In-app purchases

3 purchases

Ember Fasting

Subscriptions2
  • Ember Pro Monthly$1.991 Month
  • Ember Pro Annual$14.991 Year
One-time1
  • FastApp Pro Lifetime$29.99
3 purchases

SOL

One-time3
  • Seedling Tip$1.99
  • Sapling Tip$3.99
  • Pine Tip$8.99

Questions

Is Ember Fasting free?
Ember Fasting is free to download, with in-app purchases available.
Is SOL free?
SOL is free to download, with in-app purchases available.
Do Ember Fasting or SOL have ads?
Neither Ember Fasting nor SOL shows ads.
Which is updated more often, Ember Fasting or SOL?
Ember Fasting ships an update every 2 weeks, and SOL fortnightly. Most recently, Ember Fasting was updated on October 31, 2026 and SOL on November 5, 2026.

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